Dual wheel differential hub



Oct. 2, 1951 M. 1.. MOORE EI'AL 2,569,861

DUAL WHEEL DIFFERENTIAL HUB Filed Nov. 2 9, 1948 3 Sheets-Sheet 1 ATTORNEYS M. L. MOORE ETAL DUAL WHEEL DIFFERENTIAL HUB Oct. 2, 1951 5 Sheets-Sheet 2 Filed Nov. 29. 1948 INVEIVI'OA.

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ATTORNEYS Oct. 2, 1951 M. MOORE EI'AL DUAL WHEEL DIFFERENTIAL HUB 3 Sheets-Sheet 5 Filed Nov. 29, 1948 u WEEL Al l|ll| L. Y nzSsmom 7 Afi/ LUKE Ali Ii. m 087 uvN \Am oz ien MEN A'ITEI R N EYS Patented Oct. 2 1951 DUAL WHEEL DIFFERENTIAL HUB Murray L. Moore and Alvin D. Fritz,

Cheyenne, Wyo.

Application November 29, 1948, Serial No. 62,456

This invention relates to wheel mounting hubs particularly for mounting dual wheels on front and rear axles of trucks, buses, and the like, and in particular the invention relates to means in a Wheel mounting for providing a differential action whereby the surface speed of the tires may vary in traveling around curves while the same driving force is applied to both tires.

The purpose of this invention is to improve the construction of wheel mounting hubs for dual wheels so that one wheel may travel at a difierent speed than the other.

In the usual type of dual wheel, both tires travel at the same speed and in traveling around curves one of the tires must slide on the paving which causes excessive wear on the surface of the tire. With this thought in mind, this invention contemplates an improved hub for dual wheels wherein both wheels are driven by a com mon flange positioned between thewheels with transversely disposed pins carried by the flange and coacting with raceways in the hubs of the wheels in which the raceways are formed with alternately positioned high and low points whereby one wheel is permitted to turn in relation to the other. I

The object of this invention, is therefore, to provide means for incorporating a differential action in the hub of dual wheels to compensate for the different speeds of the Wheels in traveling around corners.

Another object of the invention is to provide an improved differential hub for dual Wheels that may be used on axles of the live or dead type and that may also be used on both front and rear axles.

Another object of the invention is to provide a diiferential hub for dual wheels of motor vehicles which provides a greater area of contact than that of the conventional spider gear diiferential.

Another object of this invention is to provide an improved hub for dual wheels of motor vehicles which provides a diiferential action between the wheels and in which braking power is applied to both wheels.

Another object of the invention is to provide an improved hub for dual wheels of motor vehicles in which a differential action is provided and through which power is applied equally to both wheels.

A further object of this invention is to provide an improved dual wheel hub with a differential action incorporated therein which is of 2 Claims. (01. 301-36) a comparatively simple and economical con-- struction.

With these and other objects and advantages in view, the invention consists of the new and useful combination, construction and arrangement of parts as hereinafter more fully described, set forth in the claims appended hereto and disclosed in the accompanying drawings forming part hereof, wherein:

Figure 1 is a longitudinal section through the improved differential hub -showing dual wheels mounted thereon, showing the hub mounted on the end of an axle and with a brake drum attached thereto;

Figure 2 is a detail illustrating an elevational view of the central part of the diiferential hub with the ends broken away and other parts omitted;

Figure 3 is a cross-section through the differential hub showing the circumferential flange with round end pins therein and with other parts omitted;

Figure 4 is an elevational view showing the raceway in a flange of one of the wheel mounting sleeves with high points therein indicated by radially disposed lines;

Figure 5 is a similar view showing the raceway in the flange of the other sleeve and with radiallydisposed lines indicating high points in the race way, the number of high points in this raceway being greater than that of the number of high points in the raceway shown in Figure 4;

Figure 6 is a sectional view taken through the raceways and flange of the wheel hub with the parts opened out showing the round end pins and with two points tially aligned;

Figure -7 is a similar view illustrating the relative position of the parts with one wheel turned slightly in relation to the other.

Referring now to the'drawings wherein like reference characters indicate corresponding parts; the improved differential mounting of this; invention includes a hub Ill having a circumfer-- ential flange II with round end pins I2 slidably mounted in openings 13 therein, wheel mounting; sleeves HI and I5 and a removable ring it through: which an outer wheel I! is mounted on the.- sleeve Hi, the inner wheel l8 being mounted on. a flange [9 of the sleeve I5.

The hub [0 may be formed to accommodate, axles of different types and in the design shown the hub is mounted by bearings 20 and 2| .on a housing 22 of an axle 23 and the outer end of the axle is provided with a cap 24 to which the;

of the raceways substanring, being attachedito' the 'rijr'i'g by studs' 39with f outer end of the hub I is attached by bolts 25. A brake drum 26 is carried by the inner end of the hub l0 and it will be understood that the brake drum may be of any type or design and may be attached to the hub in any suitable manner.

The hub I0 is driven from the axle 23 through the cap 2 A and bolts 25 and the wheels are driven through the round end pins I2, the ends of which. extend into the raceways 21 and 28 of the flanges 29 and 30 of the sleeves l4 and I5 respectively,- and with the vehicle traveling straight ahead,

both wheels are driven as a unit-.2 As illustr'atd':

sume different positions throughout the circumtefifieantepatt. thereof, inner and outer wheel mounting sleeyes rotatably mounted on the hub andpositio'n'd 'on opposite sides of said circumferential flange said sleeves having flanges on meant-legends trreretr abutting the side surfaces o f said --ci-rcumferential flange and having raceference or circular track formed on the pitch diameter of the pins. 111'- Figure 6 the two high points 'a'are shown opposite andapin-as; i--

cated by the numeral 3! is shown locked aga nst the surfaces of thepoints; however, astheflange 29 moves slightly in relationtothe flange '36-; the' point (1 travels toward the left wherein it The raceways of the flanges 2 and 3 cafeilliist'rat'ed Figures and wherei-rithe raceway 2 1'- or the flange 29- is formed with'- nine high points andthe raceway 28 of the flange 39 is-proways of ;the flange provided iii this manner; set; enteen round end pinsare usedi=in thenange H of the hub. It will be understood, however, that the raceways may contain any shitabIe'number of *high and low points- -althoug-h'- the number" of g the high points in one raceway must be dilieren t from that of the 'numb'er of-high pointsin the' other'--'and5 the number of the'--rourid em pins is proportionately charged-J The outer sleeve l [is rot'atably mounted on the Hub [0 through thje b'ear'ingsi3E- ahd and" the ring" IG is-attached 'toth'e flafig 2 9 -thereoif b'y studs 36' with nuts-31+ The we cit-the wheel IT is mounted" onthe sleeve throiig-li he nuts 40 thereon. The webM of the' wheel 1 mounted ontheflange l9 of the 'sleeve l stystaas 42 with nuts 43, and the sleeve l5 is--retatably mounted on the hub l0 through bearing-s 44 and 45'.

With the parts"ail-"all'gd;- i I'1'-'--tliis"n'ieilii'i'r a" differential action is" provided in tha -hub dual wheel 'whiclrp'ermit's mover rie'r-itof one whe 4 inrelatiori to the othei' aiid the 'wheels rh'a'y t in: either direction. 'Ih part mat ar ment of the differential-elem I tive driveon: both-' whee-ls bo and reverseaiid at the same difierential' that' fuiiction both rewa d reverse. I Theiairows show v l li nes on ure 6 of the drawing indicate the movement-0t th'e felements with th'e vehi'cl'es travelingaward and the iarrows indicated byztrie dctt s n dicate the. movement on the pa r t's -witfi the ve i it; we i s stee ways in the abutting faces therein registering with 5 the ,s paced openings through .the said circtmrerentiai' 1 flan ahd having high and; 1 w points, round endlpins slidablymounted in the opnmgst 'rough thecircum'f rential flange with metrics thereof in engagement withthe high and lowpoints of .thelraceways the inner sleeve having; @circuflife'rehtial wheel carrying flange o'n' the outer surface positioned midway of the length thereof, and a wheel: carrying: flange removably-mounted an the outer sleeve and-p ositioned m way of theiength thereof.

2. A dual wheel differential mountingl corn prising a hub hav ng: a circumferential-flange with; paced openings therethrough von the. intermediate part thereof, inner and outer Wheel mounting sleeves rotatably". mounted on the hub- @139p sititnt i;onem na e sides of said cinchin ferentlal. flange; said Sleeves having fiang'esjotithe inner ends thereof abutting theside-surfaces". I

of said circun irerential' flange and; having ra'c'e ways. inthe abutting faces registering with the spaced c'ip'enings through the said circumfere" tija'l flange",;andhaving 1iigb ahol lovv emtsthe' mnte g -r eilfl w endsf'therof iii constantellgaglfileht with the highan l low points of theraceways, the' friiimljer or 1 and my paints 6f the raceways f; the gang r onefsle'e being less'than th 'e' num er g O r ts ottn flatige ottheother" sleeve the" inner-swam htt'ving a 'cireutnfefeii'tial" wheel carrying flange on the eater surfac'e po'si tioiied inidway ofthe lehgth thereof,- and heel carrying-flangere'mbvatlyufiourited Ont deter sleeve andipositioned midway of 3 the length thereofa 1 Y r MURRAY L. Moon-Es Anvil-N DJFRITZi:

reassess-elite The followingrefereifcesare' or rtbrd in uit; file of this patent: V UNTTEE'ESVTATESV PATE'NTS FOREIGNPATENTS" I Country Date 7. 

